http://www.browning.com/customerservice/dategun/index.asp will help you date it. You need to check the auction sites to see what they are bringing.
Browning B2000 shotguns in nice shape can be readily bought for under $500.
350
No such animal......
$1,000 to $1,200
50-1000 usd
Browning Citori 12 gage over and under & a Browning Goldtrigger Light Twelve: How much are they worth?
50-500 usd
50-1000 usd
No they did not make a gun with that model number. They did make a "B2000" model between 1974 and 1983, both in 12 & 20ga.
Impossible to answer without more information
50-500 usd
50-500 usd